Pump



g- 1954 c. D. VANDENBURGH PUMP Filed Nov. 1, 1950 4 INVENTOR. CHARLE6 D. VANDENBURGH BY J? ATTORN Patented Aug. 10, 1954 UNITED STATES PATENT OFFICE PUMP Application November 1, 1950, Serial No. 193,325

2 Claims.

This invention relates in general to a pumping device and more particularly to a multiple pump of the gear type. The invention is further concerned with a gear pump which is capable of pumping a plurality of separate streams of a liquid under uniform and equal pressure or a plurality of separate streams of liquid under different pressures.

While the present invention is applicable to the pumping of any type of a liquid or gas, for purposes of illustration the same will be described as it is applicable in the manufacture of artificial fibers and filaments, such as those made from viscose and the like. It should be understood, however, that the invention is not to be limited thereby but only insofar as the same may be limited by the appended claims.

Obviously, there are many and various types of pumps known in the art. However, when it is desired or necessary to pump two or more streams of a liquid at the same pressure, rate and quantity, the accurate synchronization of two or more pumps, no matter how well they are made, is practically an impossibility. To meet this prob- 1cm, various pumps have been designed which are capable of pumping a plurality of streams of a liquid. However, in the main, such pumps are complicated in construction, hence expensive to manufacture and usually get out of adjustment very readily.

It is a general object of the present invention to provide a multiple gear pump which is capable of pumping a plurality of separate streams of a liquid at the same rate, pressure and quantity.

It is another object of the invention to provide a dual gear pump which is simple in con struction relatively inexpensive to manufacture and has only one driving means connected thereto.

It is another object of the invention to provide a dual gear pump which is not only capable of pumping two streams of a liquid at the same rate, pressure and quantity but is readily adaptable or convertible to a pump capable of pumping two streams of a liquid at different rates, pressures and quantities, in each case the pump receiving the liquid from a single source of supply.

It is a specific object of the invention to provide a dual gear pump which is particularly adapted to be employed with apparatus used in the manufacture of artificial fibers and filaments such as those made from viscose and the like.

Numerous other objects and advantages of the present invention. will be obvious from the drawing and description of, the invention hereinafter.

For a description of the invention, reference 2 should be had to the accompanying drawing in which Figure l is a top view of a dual pump mounted for use in spinning artificial fibers and filaments,

Figure 2 is a left side View of the pump in Figure 1 showing diagrammatically its relation tothe coagulating bath of the spinning machine,

Figure 3 is a right side view of the pump per se, and

Figure 4 is a sectional detail showing the side view of one of the pump housings and pump gears.

Referring to all the figures of the drawing, the dual pump comprises two intake plates or members 3 and 4 and a discharge plate or member 5. Between the members 3 and 5, there is a casing or gear housing 6 which has two overlapping circular openings 5 and 8 defining a chamber in which the pump gears 9 and iii are placed in mesh. There is a similar casing or gear housing H between the members 4 and 5 having a chamber in which the pump gears I2 and [3- are mounted.

The plates 3, 4 and 5, with the casings and pumping gears therebetween, are held tightly together by means of the tie bolt I4 having nuts 15 and IE on each end thereof and the tie bolt I? with nuts 18 and i9 thereon. The juxtaposed or interior faces of all the plates and housings are machined smooth and make a liquid-tight fit when the members are fastened together.

The driven gears 9 and I2 are mounted on the shaft 211 which extends through all the plates and the housings. Shaft 29 has a collar 21 fixed on one end thereof and a gear 22 on the other end. Gear 22 is in mesh with gear 23 mounted on the driving shaft 24 which in turn is driven by a motor or other suitable means (not shown). Idler gears H3 and I3 in mesh with gears 25 and [2. are driven by the latter and are mounted on idler shaft 25 which may also extend through all the plates 3, i and 5.

The outer plate 3 has an opening 26 drilled therein at an angle from the end thereof. An opening 21 drilled in from the side face of plate 3 communicates with opening 26 and communicates with the area of the chamber adjacent the mesh of gears 9 and. iii. From the outside of plate 3, an opening or passage 28 is drilled which communicates with opening or passage 26. In the outer plate 4, there is an opening 29 drilled therein at an angle from the end thereof. An opening 30 is drilled infrom the side face of plate d and communicates with opening 29. The opening or passage 36 communicates with the area of the chamber adjacent the mesh of gears I2 and i3. From the outside of plate 4, a hole or passage 3| is drilled which opens into the opening 29. Plugs 32 and 33 are inserted into the openings 26 and 29 in the ends of plates 3 and 4. The openings or passages 28, 2t and 2? form a channel in the plate or intake member 3, and the openings 3|, 29 and 30 form a channel in the plate or intake member 4.

The face of openings 28 and 3| are hollowed out as shown at 28a and 3|a in order to receive the hollow shafts or conduits 34 and 35 which are mounted in the saddle frame or bracket 36a and act as supporting members for the dual pump. The ends of conduits 34 and 35 are ball shaped and fit snugly into the recesses or hollowed out portions 280. and 3la, thus forming a fluid-tight ball and socket swivel joint in each instance. The conduits are screwed tightly against the outer plates 3 and 4 by means of the knurled knobs 36 and 31 on the conduits 34 and 35 respectively.

The center portions of conduits 34 and 35 have a number of openings 34c and 35a around the peripheries thereof which communicate with the openings or passages 38 and 39 in the saddle frame or bracket 36a. The frame in turn fits over the main fluid supply line 49 and is securely clamped thereto by a pair of clamping members 4| and 42 which fit around the supply line 49 and are fastened to the saddle frame by the bolts 43, 43a, 44 and 44a which pass through the clamping members and screw into the saddle frame.

The saddle frame 36a is positioned on the fluid supply line 46 so that the openings 33 and 38 therein coincide with the openings 45 and 46 in the periphery of the supply line.

The inner plate has two openings or passages 41 and 48 drilled in the edge face thereof, which is at the top as viewed in Figure 2, open ing 41 in the left side and extending downwardly at approximately a 45 angle and opening 48 in the right side and extending downwardly at approximately a 45 angle. Opening 4'! communicates with the opening or passage 49, drilled outwardly toward the right side face of plate 5, as viewed in Figure l. Passage 49 opens into the chamber for gears l2 and I3 where they mesh. Opening 48 communicates with the opening or passage 50, drilled outwardly toward the left side face of plate 5, as viewed in Figure 1. Opening 5%! is positioned so as to open into the chamber for gears 9 and Ill where they mesh. The openings 4'], 45 and 48, 55 form separate channels in the discharge plate or member 5.

When employing the dual pump for the manufacture of artificial filaments from viscose, for example, the operation is as follows: the viscose coming through the main line 453 passes up through the openings 38 and 39, through the con" duits 34 and 35, through the channel comprising openings 26 and 21 to the pumping gears 9 and Hi, and through the channel comprising openings 29 and 36 to the pumping gears l2 and i3. Both sets of pumping gears are of the same size and are driven at the same rate by the drive shaft 24 and gears 23 and 22, so that the viscose is delivered by the pumping gears under the same pressure and at the same rate to the channels comprising openings 4% and 50 in the discharge plate 5. The viscose passes out through openings 4'! and 48, through the adapters 5i and 52 inserted into openings 41 and 48 respectively, through the alkali-resistant lines 53 and 54, through the filters 55 and 55, through lines 51 and 58 to the spinnerets 59 and 66 submerged in the coagulating bath 6|. It is, of course, to be understood that the dual pump is easily adaptable to the pumping of other fluids and gases in other operations than that of producing artificial filaments and fibers.

If desired, the operation outlined above may be reversed. That is, the rotation of the drive shaft 24, and as a result the pumping gears, may be reversed and then member 5 becomes the intake plate and members 3 and 4 the discharge plates. In this instance, the fluid would flow through the channels formed by openings 47, 49 and 48, 56 to the pumping gears l2, I3 and 9, it respectively, and then be discharged through the channels in members 3 and 4, formed by the openings 2?, 2'5, 28 and 3D, 29, 3 l. When shaft it turns in a clockwise direction, as seen in Figure 2, the passages in the outer plates 3 and 4 will serve as intake conduits whereas the passages in center plate 5 will be discharge passages. However, when shaft 28) is reversed to turn counterclockwise in Figure 2 or clockwise in Figure 3, the passages in center plate 5 will be intake passages and the passages in outer plates 3 and 4 will be discharge passages.

In the illustrative embodiment of the invention shown in the drawing, the dual. pump is pivotally mounted on the conduits 34 and 35 by reason of the ball and socket joint formed by the insertion of the conduits into the openings 23a and 35a. in the faces of the intake plates 3 and 5 respectively. The pump is held down by its own weight so that gears 23 and 22 are in mesh, In addition, the ball and socket joints, formed by conduits 34 and 35 and members 3 and 4, are tight enough to prevent the disengaging of gears 22 and 23, when in operation. The pump may be lifted up out of engagement with the driving gear by hand or any other suitable means. Mounting the dual pump so that the same may be disengaged from the driving means when desired is particularly useful when a series of such pumps are being employed and all are being driven by the same drive shaft. In this way, if anything happens to any single dual pump, it may be disengaged without stopping the operation of the remaining pumps.

While the invention is primarily concerned with producing or pumping two streams of a liquid at the same rate and pressure from one pump, two streams may be pumped under different rates. This is accomplished by merely increasing or decreasing the thicknes of the separator plates or casings and the pumping gears associated therewith.

The dual pump of the present invention is simple in construction and inexpensive to manufacture, i. e., it is less costly than manufacturing two separate pumps. By employing the pump of the present invention, one is able to pump two streams of a liquid at the same rate and under the same pressure, thus alleviating the dimculty attendant upon any attempt to synchronize two separate pumps to pump two streams of a liquid at the same rate. Numerous other advantages of the invention will be obvious to those skilled in the art.

It should be understood that changes and variations may be made without departing from the spirit and scope of the invention as defined in the appended claims.

I claim:

1. A constant ratio dual pump assembly for delivering two streams of a spinning fiuid in the manufacture of artificial filaments and fibers comprising two outer plates and one center plate 5 spaced from each other, a gear housing compressed between each two adjacent plates having a double gear chamber therein and separating the plates, means for clamping the plates and housings together in fluid-tight relationship, a driven gear in the chamber of each housing, an idler gear in the chamber of each housing meshing with the driven gear, a driveshaft extending through the plates and the housings and keyed to the driven gear in each chamber, driving means for said shaft, a shaft journaling the idler gear in each chamber and supported in the plates, walls defining a separate conduit in each of the outer plates extending from an outwardly facing port in each plate to a port in each chamber, Walls defining two separate fluid conduits in the center plate, one of said conduits extending from a port on the edge of the center plate to a port in the chamber of one housing and the other of said conduits in the center plate extending from a port on the edge of the center plate to a port in the chamber of the other housing, a bracket for the pump assembly in which the plates and housings as a unit are pivotally mounted, a pair of oppositely facing ban and socket joints extending from said bracket and pivotally supporting the two outer plates at the outwardly facing port in each outer plate, and walls defining a fluid passage through said ball andv socket joints.

2. A pump assembly in accordance with claim 1 in which the bracket is supported on a spinning fluid supply line, and walls defining a conduit affording communication from the interior of the spinning fluid supply line to the fluid passage through the ball and socket joints.

References Cited in the file of this patent v UNITED STATES PATENTS Number Name Date 1,665,026 Grant Apr. 3, 1928 1,682,842 Hamer Sept. 4, 1928 1,723,493 Schotthoefer Aug. 6, 1929 1,726,663 Grant Sept. 3, 1929 2,207,493 Van Dartelen July 9, 1940 2,423,507 Lawton July 8, 1947 FOREIGN PATENTS Number Country Date 27,284 Great Britain of 1906 596,064 Great Britain Dec. 24, 1947 

